content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.flowable.internal.operators;
  
  import java.util.concurrent.atomic.AtomicBoolean;
  
  import org.reactivestreams.*;
  
  import hu.akarnokd.reactivestreams.extensions.RelaxedSubscriber;
  import io.reactivex.flowable.Flowable;
  import io.reactivex.flowable.internal.subscriptions.*;
  
  public final class FlowableTake<T> extends AbstractFlowableWithUpstream<T, T> {
      final long limit;
      public FlowableTake(Flowable<T> source, long limit) {
          super(source);
          this.limit = limit;
      }
  
      @Override
      protected void subscribeActual(Subscriber<? super T> s) {
          source.subscribe(new TakeSubscriber<T>(s, limit));
      }
  
      static final class TakeSubscriber<T> extends AtomicBoolean implements RelaxedSubscriber<T>, Subscription {
  
          private static final long serialVersionUID = -5636543848937116287L;
          boolean done;
          Subscription subscription;
          final Subscriber<? super T> actual;
          final long limit;
          long remaining;
          TakeSubscriber(Subscriber<? super T> actual, long limit) {
              this.actual = actual;
              this.limit = limit;
              this.remaining = limit;
          }
          @Override
          public void onSubscribe(Subscription s) {
              if (SubscriptionHelper.validate(this.subscription, s)) {
                  subscription = s;
                  if (limit == 0L) {
                      s.cancel();
                      done = true;
                      EmptySubscription.complete(actual);
                  } else {
                      actual.onSubscribe(this);
                  }
              }
          }
          @Override
          public void onNext(T t) {
              if (!done && remaining-- > 0) {
                  boolean stop = remaining == 0;
                  actual.onNext(t);
                  if (stop) {
                      subscription.cancel();
                      onComplete();
                  }
              }
          }
          @Override
          public void onError(Throwable t) {
              if (!done) {
                  done = true;
                  subscription.cancel();
                  actual.onError(t);
              }
          }
          @Override
          public void onComplete() {
              if (!done) {
                  done = true;
                  actual.onComplete();
              }
          }
          @Override
          public void request(long n) {
              if (!SubscriptionHelper.validate(n)) {
                  return;
              }
              if (!get() && compareAndSet(false, true)) {
                  if (n >= limit) {
                      subscription.request(Long.MAX_VALUE);
                      return;
                  }
              }
              subscription.request(n);
          }
          @Override
          public void cancel() {
              subscription.cancel();
          }
      }
  }
  